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This short article enumerates tips for qmail (a reminder for me):

Repair the queue
----------------

The queue is located here : /var/qmail/queue/ , you can repair it with queue_repair ( http://www.qcc.ca/~charlesc/software/queue_repair/ ).

command::

  ./queue_repair.py -c -s 23 --no-bigtodo /var/qmail

see:  http://www.qcc.ca/~charlesc/software/queue_repair/docs.html#docs
-c create and repair
-s 23 number of split directories
--no-bigtodo if your qmail don't use the qmail big-todo patch


Setup as MX secondary for a domain
----------------------------------

It's quite simple, add the domain in the /var/qmail/control/rcpthosts of each recorded MX secondary. And, restarts qmail (just kill -HUP).

exemple::

    server1.domain1.tld has:
    MX   10 server1.domain1.tld
    MX   20 server2.domain2.tld

    on server2.domain2.tld,
    in /var/qmail/control/rcpthosts file add line:
    server1.domain1.tld 

Watch qmail logs with date/time
-------------------------------

Qmail use a special log format for the date and the time (maybe seconds number since 1/1/1970 ). tai64nlocal shows user fiendly date/time.

exemple::

    # tail -f /var/log/qmail/current  | tai64nlocal
    2005-02-10 14:07:55.565508500 delivery 3973: success: did_1+0+0/
    2005-02-10 14:07:55.565510500 status: local 0/10 remote 0/20
    2005-02-10 14:07:55.565511500 end msg 52055
    2005-02-10 14:27:01.610629500 new msg 52055